Billet and method and means for casting the same



C. S. MORSE.

1,387,290. Patented Aug. 9, 192 1w si 5%! i6 9 V 15 W Y I Jvwewto'a i Mwoo I I m UNITED STATES PATENT, OFFICE.

CHARLES S; MORSE, OF ROLAND PARK, MARYLAND, ASSIGNOR TO BALTIMORE TUBE COMPANY, INCORPORATED, A CORPORATION OF VIRGINIA.

BILLET AND METHOD AND MEANS FOR CASTING THE SAME.

Specification of Letters Patent.

Patented Aug. 9, 1921.

Application filed May 2, 1919. SerialNo. 294,154.

useful Billet and Method and Means for Casting the Same, of which the following is a specification.

My invention relates to an improved billet and the method and means for casting the The means for casting the billet comprises a mold element having a cylindrical or slightly tapered formation so that the casting is readily removable therefrom, and a separable cooperating mold element or core cylindrical or having a corresponding slightly tapered formation so that the same may be readily removed from the casting or billet.

The mold elements may be supported in cooperative relationship in any suitable way and the molten metal may be introduced in the space between said elements in a number of different ways, and several methods may be employed for eliminating the dross from the casting and for preventing the casting or the billet from sticking to the mold elements.-

Referring to the drawings which illustrate merely by way of example suitable means for edecting my invention Figure 1 is a sectional view of the mold elements in relative operative position, also showing means whereby one of the mold elements may be rotated during the process of casting and whereby the core element may be withdrawn.

Fig. 2 is a similarview showing the elements separated with the metal in the receiving element. v i

Fig. 3 is a similar view showing the upper mold element or core lowered into the other element and causing the metal to fill the space between the elements.

Fig. 4 is a similar view showing means for introducing the metal between the elements at a point near the bottom thereof.

S. Morse, a

' walls.

Fig. 5 is a similar view showing means whereby a cooling fluid is introduced into a mold element to reduce the temperature thereof.

Fig. 6 is a sectional view of the billet or casting. i

Similar numerals refer to similar parts throughout the several views.

The mold element 7 is the receiving element having upwardly extending parallel This element is supported on the trunnion '8. The other element 9, is the core element shown in the present example as of slightly tapered formation and of less dimension in cross-section. troduced in any suitable way, as .by means of the pouring cup or funnel 10, provided with suitably spaced holes 12, delivering into the space 11 between the said elements. Before'the molten metal has completely solidified, the core element 9 is preferably slowly withdrawn from the casting or billet, and the casting or billet is then removed from the mold 7. l

The core element 9, as shown in Figfl,

The metal is inis supported on the threaded rod 13 threaded in the split nut 14 connected with the hollow spindle 15 of the slow speed electric motor 16 which serves to rotate the core element 9, also for feeding the screw for withdrawing the core, when the upper clutch 17, which is splined on the upper end of rod 13, is engaged with its cooperating clutch element.

In Fig. 2,1 show the metal first introduced into mold 7 and the core 9 then lowered into the element causing the metal to rise therein as shown in Fig. 3.

In order to prevent the pushing ofthe dross which rises to the top of the molten metal into the body of the metal by inserting the end of core 9 into the same, it provide, as in Fig. 4, means for introducing the metal into the mold 7, or the space 11, between 7 and 9, through a channel 18 entering the bottom thereof. 7

The metal may be introduced through the channel 18 by gravity or by any suitable pressure means not shown.

By rotating one element either 7 or 9 or both elements, one in direction opposite the said mold or molds, as for instance, by circulating a cooling fluid between the Walls of one or both of said elements. For example, by means of the pipes 19 and 20, leading to and from element 7.

By withdrawing the core, before the casting has completely solidified; or as the metal is introduced into space 11, so that as the metal rises in the mold, the core is slowly withdrawn, it is possible to secure a longer and more nearly cylindrical cast-ing, especially adapted to the making of tubes.

The withdrawal of the core from the mold may begin at about the same time as the commencement of the pouring, and may be completed at about the same time as the completion of the pouring.

The presumption is that the molten metal, coming in contact with the cold core, hardens as to its inner surface, which contacts with the core, sufiieiently to hold the body of the billet until the same solidifies. The billet is then forced from the mold.

What I claim is 1.. The method of casting a hollow billet which consists in introducing the molten metal into the space formed between cooperating separable metal mold and core elements having approximately parallel walls and, simultaneously with the pouring, causing a relative and continuous separating movement between the core and the mold and casting.

2. The method of casting a hollow billet which consists in introducing the molten metal into the space formed between cooperating separable metal mold and core elements having approximately parallel walls, and withdrawing the core element from the mold and casting simultaneously with the pouring and before the metal becomes completely solidified.

3. The method of casting a hollow billet which consists in introducing the molten metal into the space formed between cooperating separable metal mold and core elements having approximately parallel walls and withdrawing the core slowly from the mold and casting simultaneously with the introduction of the molten metal.

4:. The method of casting a hollow billet which consists in introducing the molten metal into the space formed between cooperating separable metal mold and core elementshaving approximately parallel walls and causing a relative rotation between the core and mold elements and a continuous withdrawal of the core from the mold and casting during the pouring operation.

5. The method of casting a hollow billet which consists in introducing the molten metal into the space formed between cooperating separable metal mold and core elements having approximately parallel walls, subjecting the walls of an element to a cooling medium during said casting operation and withdrawing the core from the mold duction of the molten metal.

CHARLES S. MORSE. 

